LI200R Pyranometer
Accurate, Versatile
Compatible with most Campbell Scientific data loggers
weather applications supported water applications supported energy applications supported gas flux & turbulence applications supported infrastructure applications supported soil applications supported

Overview

The LI200R, manufactured by LI-COR, is a silicon pyranometer that accurately monitors sun plus sky radiation for solar, agricultural, meteorological, and hydrological applications. It uses a silicon photovoltaic detector mounted in a cosine-corrected head to measure solar radiation. A shunt resistor in the sensor’s cable converts the signal from microamps to millivolts, allowing this sensor to be measured directly by a Campbell Scientific data logger.

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Benefits and Features

  • Calibrated against an Eppley precision spectral pyranometer (PSP) for the daylight spectrum (400 to 1100 nm)
  • Uniform sensitivity up to 82° incident angle

Images

LI200R-L with cable
LI200R-L with cable
LI200R-L with cable
LI200R-L with sensor head separated from cable
LI200R-L with a LI2003S leveling base (sold separately)
LI200R-L with a LI2003S leveling base, mounting bracket, and CM225 (all sold separately)
LI200R-L with a LI2003S leveling base, mounting bracket, and CM225 (all sold separately)
LI200R-L with a LI2003S leveling base, mounting bracket, and CM225 (all sold separately)

Technical Description

The LI200R measures incoming solar radiation with a silicon photovoltaic detector mounted in a cosine-corrected head. The detector outputs current; a shunt resistor in the sensor cable converts the signal from current to voltage, allowing the LI200R to be measured directly by Campbell Scientific data loggers.

The LI200R is calibrated against an Eppley Precision Spectral Pyranometer to accurately measure sun plus sky radiation. Campbell Scientific does not recommend using the LI200R under vegetation or artificial lights because it is calibrated for the daylight spectrum (400 to 1100 nm).

Specifications

Spectral Range 400 to 1100 nm
Calibration ±5% traceable to the U.S. National Institute of Standards Technology (NIST)
Sensitivity 0.13 kW m-2 mV-1 (typically)
Linearity Maximum deviation of 1% up to 3000 W m-2
Absolute Error in Natural Daylight
  • ±5% (maximum)
  • ±3% (typical)
Shunt Resistor 100 Ω, 1%, 50 ppm
Stability < ±2% change over a 1-year period
Response Time < 1 μs
Temperature Dependence ±0.15% per °C maximum
Cosine Correction Cosine corrected up to 82° angle of incidence
Operating Temperature Range -40° to +65°C
Relative Humidity Range 0 to 100%
Detector Description High-stability silicon photovoltaic (blue enhanced)
Sensor Housing Description Weatherproof anodized aluminum case with acrylic diffuser and stainless-steel hardware; O-ring seal on the removable base and cable assembly
Diameter 2.36 cm (0.93 in.)
Height 3.63 cm (1.43 in.)
Weight 84 g (2.96 oz)

Compatibility

Please note: The following shows notable compatibility information. It is not a comprehensive list of all compatible products.

Dataloggers

Product Compatible Note
CR1000
CR1000X
CR200X (retired)
CR216X (retired)
CR300
CR3000
CR310
CR5000 (retired)
CR6
CR800
CR850
CR9000X

Additional Compatibility Information

Mounts

To ensure accurate measurements, the sensor should be leveled using an LI2003S leveling fixture, which incorporates a bubble level and three adjusting screws. The LI2003S leveling fixture mounts to a crossarm using the CM225 mount. These sensors should be mounted away from all obstructions and reflective surfaces that might adversely affect the measurement.

Data Logger Considerations

The LI200R-L requires one differential analog input channel per probe.

Resources and Links

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